<template>
  <div>
    <!--  面包屑导航区域  -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>分类参数</el-breadcrumb-item>
    </el-breadcrumb>
    <!--  卡片区域  -->
    <el-card>
      <el-alert title="添加商品信息" type="info" center show-icon></el-alert>
      <!--   步骤条区域   -->
      <el-steps :space="200" :active="activeIndex * 1" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!--   tab栏   -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
        <el-tabs v-model="activeIndex" :tab-position="'left'"  :before-leave="beforeLeave" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                  v-model="addForm.goods_cat"
                  :options="cateList"
                  expandTrigger="hover"
                  :props="cateProps"
                  @change="handleChange">
              </el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!--  渲染表单的item项 -->
            <el-form-item v-for="item in manyTableData" :label="item.attr_name" :key="item.attr_id">
              <!-- 复选框-->
              <el-checkbox-group v-model="item.attr_vals" >
                <el-checkbox :key="i" v-for="(cb,i) in item.attr_vals" :label="cb" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item v-for="item in onlyTableData" :label="item.attr_name" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!--
              图片上传uploadup    action表示图片要上传到的后台api地址
            -->
            <el-upload
                :action="upLoadUrl"
                :on-preview="handlePreview"
                :on-remove="handleRemove"
                list-type="picture"
                :headers="headerObj"
                :on-success="handleSuccess">
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button type="primary" @click="btnAdd" class="btn-add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!--  展示预览图片  -->
    <el-dialog
        title="提示"
        :visible.sync="previewVisible"
        width="30%">
      <img :src="previewPat" class="previewImg">
    </el-dialog>
  </div>
</template>

<script>
  import _ from 'lodash'
  export default {
   name: "Add",
    data(){
      return {
        activeIndex : '0',
        addForm:{
          goods_name:'',
          goods_price:0,
          goods_weight:0,
          goods_number:0,
          //商品所属的分类数组
          goods_cat:[],
          //图片
          pics:[],
          // 商品描述
          goods_introduce:'',
          attrs:[]
        },
        addFormRules: {
          goods_name:[{required: true, message: '请输入商品名称', trigger: 'blur'}],
          goods_price:[{required: true, message: '请输入商品价格', trigger: 'blur'}],
          goods_weight:[{required: true, message: '请输入商品重量', trigger: 'blur'}],
          goods_number:[{required: true, message: '请输入商品数量', trigger: 'blur'}],
          goods_cat:[{required: true, message: '请选择商品分类', trigger: 'blur'}],

        },
        //商品分类的数据
        cateList:[],
        selectedCateKeys:[],
        cateProps:{
          label:'cat_name',
          value:'cat_id',
          children:'children'
        },
        //动态参数
        manyTableData:[],
        // 静态属性
        onlyTableData:[],
        //上传图片地址
        upLoadUrl:'http://www.ysqorz.top:8888/api/private/v1/upload',
        //图片上传组件的headers的请求头对象
        headerObj:{
          Authorization:window.sessionStorage.getItem('token')
        },
        //预览的图片地址
        previewPat:'',
        //预览图片是否展示
        previewVisible:false,
      }
    },
    created() {
     this.getCateList()
    },
    computed:{
     cateId(){
       return this.addForm.goods_cat[2]
     }
    },
    methods:{
     //获取所有商品分类的数据
     async getCateList(){
       const {data:res} = await this.$http.get('categories')
       if(res.meta.status !== 200){
         return this.$message.error("获取参数列表失败")
       }
       this.cateList = res.data
       console.log(this.cateList )
     },
      //级联选择器选择项发生变化，就会触发这个函数
      handleChange(){
        if(this.addForm.goods_cat.length !== 3){
          this.$message.info("请选择三级分类")
          this.addForm.goods_cat.length = []
        }
      },
      beforeLeave(activeName, oldActiveName){
        // console.log('新'+activeName)
        // console.log('旧'+oldActiveName)
        if(oldActiveName === '0' && this.addForm.goods_cat.length !== 3){
          this.$message.error("请选择三级分类")
          return false
        }
      },
      async tabClicked(){
        if(this.activeIndex === '1'){
          const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{
            params:{sel:'many'}
          })
          if(res.meta.status !== 200){
            return this.$message.error("获取动态参数失败")
          }
          res.data.forEach(item => {
            item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
          })
          this.manyTableData = res.data
          console.log(this.manyTableData)
        }
        else if(this.activeIndex === '2'){
          const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{
            params:{sel:'only'}
          })
          if(res.meta.status !== 200){
            return this.$message.error("获取静态属性失败")
          }
          this.onlyTableData = res.data
          console.log(this.onlyTableData)
        }
      },
      //处理图片预览
      handlePreview(file){
        console.log(file)
        this.previewVisible = true
        this.previewPat = file.response.data.url
      },
      //处理图片删除
      handleRemove(file){
        console.log(file)
        //1.获取将要删除的图片的临时路径
        const filePath = file.response.tmp_path
        //2.从pics数组中，找到图片对应的索引值
        const i = this.addForm.pics.findIndex(x => x.pic === filePath)
        //3.调用函数的splice方法，把图片信息对象，从pics数组移除
        this.addForm.pics.splice(i,1)
        console.log(this.addForm)
      },
      //监听图片上传成功的事件
      handleSuccess(response){
        //1.拼接得到一个图片对象
        const picInfo = {pic:response.data.tmp_path}
        //1.将图片信息对象，push到pics的数组
        this.addForm.pics.push(picInfo)
        console.log(this.addForm.pics)
      },
      //添加商品的按钮
      btnAdd(){
        //最后提交前做一次数据的检查
        this.$refs.addFormRef.validate(async valid => {
          if (!valid) {
            return this.$message.error('请填写必要的表单项！')
          }
          // 执行添加的业务逻辑
          // lodash   cloneDeep(obj)
          const form = _.cloneDeep(this.addForm)
          form.goods_cat = form.goods_cat.join(',')
          // 处理动态参数
          this.manyTableData.forEach(item => {
            const newInfo = {
              attr_id: item.attr_id,
              attr_value: item.attr_vals.join(' ')
            }
            this.addForm.attrs.push(newInfo)
          })
          // 处理静态属性
          this.onlyTableData.forEach(item => {
            const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
            this.addForm.attrs.push(newInfo)
          })
          form.attrs = this.addForm.attrs
          console.log(form)

          //发起请求添加参数，商品的名称必须是唯一的
          const {data:res} = await this.$http.post('goods',form)
          if(res.meta.status !== 201){
            return this.$message.error("添加商品失败")
          }
          this.$message.success("添加商品成功")
          this.$router.push('/goods')
        })
      }
    }

  }
</script>

<style scoped>
  .el-checkbox{
    margin:0 10px 0 0;
  }
  .previewImg{
    width: 100%;
  }
  .btn-add{
    margin-top: 15px;
  }
</style>